package com.itheima.reggie_1.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie_1.dto.DishDto;
import com.itheima.reggie_1.entity.Dish;
import com.itheima.reggie_1.entity.DishFlavor;
import com.itheima.reggie_1.mapper.DishMapper;
import com.itheima.reggie_1.service.DishFlavorService;
import com.itheima.reggie_1.service.DishService;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private DishMapper dishMapper;
    /**
     * 新增菜品,同时保存对应的口味数据
     * @param dishDto
     */
    @Override
    public void saveWithFlavor(DishDto dishDto) {
//        保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        Long dishId = dishDto.getId();// 菜品id
//        菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());
//        保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
//        查询菜品基本信息,从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
//        查询当前菜品对应的口味信息,从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());// where dish_id = ?
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
//        更新dish表基本信息
        updateById(dishDto);
//        清理当前菜品对应的口味数据---dish_flavor表的delete操作 delete from dish_flavor where dish_id = ?
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
//        添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }

    @Override   // dishName = '%辣子鸡%'
    public IPage<DishDto> selectByPage(Integer page, Integer pageSize, String dishName) {
//        分页构造器
        Page<DishDto> pageInfo = new Page<>(page,pageSize);
        if (StringUtils.isNotEmpty(dishName)) {
            dishName = "%" + dishName + "%";
        }
        dishMapper.selectPageVo(pageInfo,dishName);
        return pageInfo;
    }
}
